d2-R Revised version of the attention and concentration test

Rolf Brickenkamp, Lothar Schmidt-Atzert, Detlev Liepmann
Polish adaptation and manual:
Iwona Bac, Joanna Stańczak
Group or individual administration; time limit – approx. 5 min.
Test users:
Psychologists (MA in psychology required)
C – for psychologists only

The d2-R test is designed to measure attention and concentration. It is a revised version of the earlier d2 test. Revisions include an extra exercise sheet containing instructions, examples and exercises; enlarged number of characters in each line and a self-copying sheet for performance assessment as well as simplified score calculation.

The examinee task is to cross out within a limited period of time particular symbols from among the group of similar symbols presented to him/her. The test scores provide indices which allow to assess ability to concentrate as well as speed and accuracy of work performance. 

Reliability: very high internal consistency coefficients; high stability as proved in German research studies.   

Validity: expected correlations were proved with tools measuring attention focus (TUS), executive functions (CTT), verbal memory (CVLT) and visual memory (BVRT and DCS-II). The validity is also proved by the fact that the older the examinees the lower their scores in all indices.

Norms: for adults aged 20–79

Aplicability: The d2R test can be applied wherever it is important to check attention, concentration, ability to work under pressure as well as work speed and accuracy. Main application areas are those related to drivers assessment, assessement of candidates for jobs which are difficult, dangerous or require more attention and concentration, assessement of persons with central nervous system damages as well as to psychiatric examination.

The tool is extremely useful in recruitment and selection processes and in professional counselling. It can be applied in clinical research (neuropsychological and psychiatric) and in scientific programs.    


  • Manual
  • Test sheets (25 cop.)
  • Score sheets (25 cop.)
  • Exercise sheets (25 cop.)


Please note: All of our tests are published in Polish. There are not available other language versions of our tools.

Secondary menu


Wskaż newsletter, który chcesz zasubskrybować, lub z subskrypcji którego chcesz zrezygnować.